[PATCH v6.5 04/26] x86: Introduce a common cpuid_policy_updated()

From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xen.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: [PATCH v6.5 04/26] x86: Introduce a common cpuid_policy_updated()
Date: Thu, 4 Jan 2018 00:15:33 +0000	[thread overview]
Message-ID: <1515024955-13390-5-git-send-email-andrew.cooper3@citrix.com> (raw)
In-Reply-To: <1515024955-13390-1-git-send-email-andrew.cooper3@citrix.com>

No practical change at the moment, but future changes will need to react
irrespective of guest type.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
---
 xen/arch/x86/domain.c        | 12 ++++++++++++
 xen/arch/x86/domctl.c        |  4 ++--
 xen/arch/x86/hvm/hvm.c       |  2 --
 xen/include/asm-x86/domain.h |  2 ++
 4 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index b17468c..d383489 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -363,6 +363,8 @@ int vcpu_initialise(struct vcpu *v)
 
         if ( (rc = init_vcpu_msr_policy(v)) )
             goto fail;
+
+        cpuid_policy_updated(v);
     }
 
     return rc;
@@ -2019,6 +2021,16 @@ int domain_relinquish_resources(struct domain *d)
     return 0;
 }
 
+/*
+ * Called during vcpu construction, and each time the toolstack changes the
+ * CPUID configuration for the domain.
+ */
+void cpuid_policy_updated(struct vcpu *v)
+{
+    if ( is_hvm_vcpu(v) )
+        hvm_cpuid_policy_changed(v);
+}
+
 void arch_dump_domain_info(struct domain *d)
 {
     paging_dump_domain_info(d);
diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index cc7f433..5973d9f 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -294,12 +294,12 @@ static int update_domain_cpuid_info(struct domain *d,
         break;
     }
 
-    if ( is_hvm_domain(d) && call_policy_changed )
+    if ( call_policy_changed )
     {
         struct vcpu *v;
 
         for_each_vcpu( d, v )
-            hvm_cpuid_policy_changed(v);
+            cpuid_policy_updated(v);
     }
 
     return 0;
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 61df92c..6a1c752 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1555,8 +1555,6 @@ int hvm_vcpu_initialise(struct vcpu *v)
         hvm_set_guest_tsc(v, 0);
     }
 
-    hvm_cpuid_policy_changed(v);
-
     return 0;
 
  fail6:
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index f699119..4679d54 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -79,6 +79,8 @@ void toggle_guest_mode(struct vcpu *);
 /* x86/64: toggle guest page tables between kernel and user modes. */
 void toggle_guest_pt(struct vcpu *);
 
+void cpuid_policy_updated(struct vcpu *v);
+
 /*
  * Initialise a hypercall-transfer page. The given pointer must be mapped
  * in Xen virtual address space (accesses are not validated or checked).
-- 
2.1.4


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